Jessica is a 3 year old girl who has been brought to you by her mother June, who informs you that she is complaining about having a sore mouth for the last 2 days. She is refusing to eat but still drinking plenty of fluids. Systems review is unremarkable. On examination, Jessica has a crop of vesicles on her hard palate, in addition, you can see three shallow yellow-grey ulcers on her tongue. Observations are all within normal limits. You make a diagnosis of Hand, foot and mouth disease and explain management to June.
What is the most appropriate advice regarding when Jessica can return to nursery?